Tool clamp for flange pipe fitting welding

Abstract

The invention discloses a tool clamp for flange pipe fitting welding, and relates to the technical field of flange pipe fitting welding, the tool clamp comprises a hollow carrier plate and a pipe fitting body mounted on the upper surface of the hollow carrier plate, and further comprises a spherical hammer which is arranged on the upper surface of the hollow carrier plate and can knock the welding seam position of the pipe fitting body, the driving mechanism is arranged in the middle of the upper surface of the hollow carrying plate, used for being connected with the spherical hammer and capable of controlling the spherical hammer to move along a set path, and the driving mechanism can drive the spherical hammer to track the welding gun in real time, so that just-molten melt permeates into the deep layer of a welding seam of the pipe fitting body, and synchronous fixing is achieved through the outer fixing plate and the inner fixing rod; a spherical hammer tracks a welding gun to knock a welding seam in real time and timely eliminates stress; an inner fixing rod is switched into a dynamic positioning mode in the knocking process; the pipeline is released at the knocking moment; a permeation space is created for melt;

Description

Technical Field

[0001] This invention relates to the field of flange pipe welding technology, specifically to a tooling fixture for welding flange pipe fittings. Background Technology

[0002] In industrial piping systems, flange fittings are key components for connecting pipes, valves, pumps and other equipment. They are widely used in petroleum, chemical, power, pharmaceutical, shipbuilding and municipal engineering fields. Their main function is to achieve detachable and sealed connections between pipes, which facilitates installation, inspection and maintenance. Flange fittings are formed by welding a flange and a pipe. During the welding process, special tooling fixtures are required to fix them so that the flange and the pipe are coaxial and do not deviate. When welding, the operator places the flange on a plate, inserts the pipe into the inner hole of the flange with the pipe end at the flange neck, and then uses a welding torch to weld at the connection between the pipe and the flange neck. However, during the welding of flange fittings, the weld seam and heat-affected zone are rapidly heated. After cooling, the shrinkage is constrained by the surrounding base material, resulting in tensile stress. This leads to an imbalance of forces at the joint between the flange and the fitting, affecting the service life of the flange fitting. Currently, most operators use hammering to release stress and extend the service life of the flange fitting after welding. However, existing tooling fixtures can only limit and fix flange fittings. During the stress relief process, operators need to manually operate hammers to strike the flange fittings. It is difficult to ensure that the force and frequency of the hammering are uniform, resulting in poor stress relief and affecting the welding quality of the flange fittings. In addition, to avoid deviation, hammering must be carried out after welding is completed and the molten metal has solidified. At this time, the molten metal has lost its fluidity, and hammering can only passively release some residual stress. It cannot help the molten metal penetrate into the weld gap and the root of the groove, and cannot take into account both stress relief and weld fusion quality.

[0003] To address the aforementioned problems, this invention proposes a welding fixture for flange fittings that can both fix the flange fittings during the welding process and release stress in real time during the welding process, while also assisting the molten liquid to penetrate deeper into the weld. Summary of the Invention

[0004] The present invention addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. Specifically, the present invention aims to provide a tooling fixture for welding flange pipe fittings, thereby solving the problem mentioned in the background that existing welding fixtures can only perform clamping and cannot simultaneously relieve stress during the welding process.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a tooling fixture for welding flange pipe fittings, comprising a hollow carrier plate and a pipe fitting body mounted on the upper surface of the hollow carrier plate, further comprising a spherical hammer disposed on the upper surface of the hollow carrier plate for striking the weld position of the pipe fitting body, and a drive mechanism disposed in the middle of the upper surface of the hollow carrier plate for connecting the spherical hammer and controlling the movement of the spherical hammer along a set path, wherein the drive mechanism can drive the spherical hammer to track the welding torch in real time, so that the molten liquid penetrates into the deep layer of the weld of the pipe fitting body; The outer wall of the pipe fitting body is provided with four external fixing plates distributed at equal angles, and the inner wall of the pipe fitting body is provided with four internal fixing rods distributed at equal angles, and the four internal fixing rods correspond one-to-one with the four external fixing plates.

[0006] Preferably, the upper surface of the hollow carrier plate is provided with four strip-shaped grooves, the bottom of each outer fixing plate is fixedly connected with a slider that slides along the strip-shaped groove, and the bottom of each inner fixing rod is fixedly connected with a sliding rod that slides along the strip-shaped groove.

[0007] Preferably, the inner wall of the hollow carrier plate is rotatably connected to a first turntable, the upper surface of the first turntable is rotatably connected to two first connecting rods, the lower surface of the first turntable is rotatably connected to two second connecting rods, and one end of each of the two first connecting rods is connected to two of the outer fixing plates via a slider, and one end of each of the two second connecting rods is connected to the other two outer fixing plates via a slider. A hydraulic cylinder is mounted on the upper surface of the hollow carrier plate, and the piston rod of the hydraulic cylinder is threadedly connected to the outer wall of one of the sliders.

[0008] Preferably, a second turntable is arranged parallel to the first turntable above it, and the second turntable is coaxially arranged with the first turntable. The surface of the second turntable is provided with four arc-shaped grooves for sliding rods, and the inner wall of the middle part of the second turntable is provided with a guide groove, and the inner wall of the guide groove is slidably connected with a protrusion.

[0009] Preferably, the driving mechanism includes a main shaft that passes through the second turntable and is rotatably connected to the first turntable. A rack is slidably connected to the side wall of the main shaft. A large gear meshes with one side of the rack, and a small gear meshes with one side of the large gear. The protrusion is fixedly connected to the bottom of the rack.

[0010] Preferably, a mounting bracket is fixedly connected to the top of the main shaft, the large gear is rotatably connected to the inner wall of the mounting bracket via a shaft, a rotating shaft passes through the interior of the small gear, a rocker arm is fixedly connected to one end of the rotating shaft, a through groove is provided on the surface of the rocker arm, and a lever is slidably connected to the inner wall of the through groove, a cylinder is mounted on the outside of the mounting bracket, the piston rod of the cylinder is threadedly connected to the lever, and a telescopic rod is fixedly connected to the outer surface of the rotating shaft.

[0011] Preferably, the telescopic rod includes a telescopic rear rod fixedly connected to the rotating shaft, and a telescopic front rod sliding along the telescopic rear rod. The inner wall of the telescopic rear rod is rotatably connected to a lead screw, and the lead screw and the telescopic front rod are connected by a threaded connection.

[0012] Preferably, a limiting rod is fixedly connected to the outer wall of the spherical hammer, and a spring is sleeved on the outside of the limiting rod.

[0013] Preferably, a motor is mounted on the lower surface of the hollow carrier plate, and the bottom of the main shaft passes through the hollow carrier plate and is connected to the output shaft of the motor.

[0014] Compared with the prior art, the beneficial effects of the present invention are: Four equally angled external fixing plates are provided on the outer wall of the pipe fitting body to fix the outer wall of the flange. Through the transmission of the first and second connecting rods, the four external fixing plates open and close synchronously, thereby centering the flange. Four equally angled internal fixing rods are provided on the inner wall of the pipe fitting body to fix the inner wall of the pipe. The protrusion slides up and down along the guide groove, thereby driving the second turntable to rotate. The clockwise rotation of the second turntable drives the four internal fixing rods to slide outward synchronously, pressing and fixing the inner wall of the pipe. Conversely, they disengage from the pipe. Since the second turntable is coaxial with the first turntable, the coaxiality of the pipe and the flange of the pipe fitting body can be ensured, and the inner and outer parts are fixed at the same time, thereby improving the welding quality and ensuring that the pipe and the flange always remain coaxial in the welding operation diagram of the pipe fitting body. In addition, a spherical hammer that tracks the movement of the welding torch in real time is installed on the hollow carrier plate. The main shaft is driven to rotate by a motor, which in turn drives the spherical hammer to rotate at a constant speed. Its rotation speed is consistent with the moving speed of the welding torch, and it tracks the position of the welding torch in real time. It always works in a front-to-back manner with the welding torch. During the welding process, when the welding torch moves along the weld seam of the pipe body, the drive mechanism will precisely control the synchronous movement of the spherical hammer, always keeping it in a suitable position behind the welding torch. Once the weld seam is formed, the spherical hammer will strike it in time. During the striking process, in conjunction with the elasticity of the spring, a uniform and continuous small-amplitude vibration is formed, which prolongs the time when energy is applied to the weld seam, promotes the molten metal to penetrate deeper. Welding and striking are carried out simultaneously, stress is eliminated in real time, and the welding effect is improved. Furthermore, driven by the pinion, gear, and rack, the spherical hammer's striking signal is directly transmitted to the second turntable. When the spherical hammer strikes the weld, the inner fixing rod simultaneously retracts inward and disengages from the inner wall of the pipe, preventing the pipe from locking with the flange. Under the hammer's strike, the pipe can still undergo a small displacement, facilitating the penetration of the molten metal into the deeper layers of the weld. When the spherical hammer detaches from the weld, the inner fixing rod simultaneously expands outward, repositioning and locking the pipe, recalibrating its position, and ensuring the pipe and flange remain coaxial again. Compared to the traditional fixed positioning method, the dynamic positioning mode releases the pipe constraint at the moment of impact, creating penetration space for the molten metal, allowing it to fully fill the weld gap, improving weld strength, effectively enhancing welding effect and quality, and further strengthening the weld's firmness. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 This is a schematic cross-sectional view of the hollow carrier plate of the present invention.

[0017] Figure 3 This is a schematic diagram of the structure of the first and second turntables of the present invention.

[0018] Figure 4 This is a schematic diagram of the connection structure between the first turntable and the outer fixing plate of the present invention.

[0019] Figure 5 This is a schematic diagram of the connection structure between the second turntable and the inner fixing rod of the present invention.

[0020] Figure 6 This is a cross-sectional view of the drive mechanism and the second turntable of the present invention.

[0021] Figure 7 This is a schematic diagram of the second turntable structure of the present invention.

[0022] Figure 8 This is a schematic diagram of the connection structure of the large gear, small gear, and rack of the present invention.

[0023] Figure 9 This is a schematic diagram of the connection structure between the protrusion and the guide groove of the present invention.

[0024] In the diagram: 1. Hollow carrier plate; 101. Strip groove; 102. First turntable; 103. First connecting rod; 104. Second connecting rod; 105. Second turntable; 106. Arc groove; 107. Guide groove; 108. Protrusion; 2. Pipe body; 3. Spherical hammer; 301. Limiting rod; 302. Spring; 4. Drive mechanism; 401. Main shaft; 402. Rack; 403. Large gear; 404. Small gear; 405. Rotating shaft; 406. Rocker arm; 407. Pulley; 408. Telescopic rear rod; 409. Telescopic front rod; 4010. Lead screw; 4011. Cylinder; 5. Outer fixing plate; 6. Inner fixing rod; 7. Slider; 8. Slide rod; 9. Motor; 10. Hydraulic cylinder. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figures 1 to 9 The present invention provides a technical solution: a tooling fixture for welding flange pipe fittings, including a hollow carrier plate 1 and a pipe fitting body 2 installed on the upper surface of the hollow carrier plate 1, and a spherical hammer 3 disposed on the upper surface of the hollow carrier plate 1 to perform a hammering operation on the weld position of the pipe fitting body 2, and a drive mechanism 4 disposed in the middle of the upper surface of the hollow carrier plate 1 for connecting the spherical hammer 3 and controlling the movement of the spherical hammer 3 along a set path, and the drive mechanism 4 can drive the spherical hammer 3 to track the welding torch in real time so that the molten liquid penetrates into the deep layer of the weld of the pipe fitting body 2; The outer wall of the pipe fitting body 2 is provided with four external fixing plates 5 distributed at equal angles, and the inner wall of the pipe fitting body 2 is provided with four internal fixing rods 6 distributed at equal angles, and the four internal fixing rods 6 correspond one-to-one with the four external fixing plates 5. The hollow carrier plate 1 serves as the basic installation platform, supporting the pipe body 2, the spherical hammer 3, and the drive mechanism 4. The core function of the spherical hammer 3 is to strike the weld position of the pipe body 2. In conjunction with the welding torch operation, the drive mechanism 4 drives the spherical hammer 3 to move in real time, enabling the spherical hammer 3 to track the welding torch in real time and work in front of and behind the welding torch. This promotes the penetration of the newly molten liquid into the depth of the weld. Welding and striking are carried out simultaneously, stress is eliminated in real time, and the welding effect is improved.

[0027] In addition, four external fixing plates 5 are provided on the outer wall of the pipe fitting body 2 at equal angles for external fixing, and four internal fixing rods 6 are provided on the inner wall of the pipe fitting body 2 at equal angles, corresponding one-to-one with the external fixing plates 5. By fixing internally and externally synchronously, the stability of the pipe fitting body 2 during the welding process is enhanced, ensuring that the pipe and flange always remain coaxial in the welding operation diagram of the pipe fitting body 2, and avoiding displacement from affecting the weld quality.

[0028] In this embodiment, as Figure 1 and Figure 2 As shown, the upper surface of the hollow carrier plate 1 is provided with four strip grooves 101. The bottom of each outer fixing plate 5 is fixedly connected with a slider 7 that slides along the strip groove 101. The bottom of each inner fixing rod 6 is fixedly connected with a sliding rod 8 that slides along the strip groove 101. The inner wall of the hollow carrier plate 1 is rotatably connected to a first turntable 102. The upper surface of the first turntable 102 is rotatably connected to two first connecting rods 103, and the lower surface of the first turntable 102 is rotatably connected to two second connecting rods 104. One end of each of the two first connecting rods 103 is connected to two of the outer fixing plates 5 via a slider 7, and one end of each of the two second connecting rods 104 is connected to the other two outer fixing plates 5 via a slider 7. A hydraulic cylinder 10 is mounted on the upper surface of the hollow carrier plate 1, and the piston rod of the hydraulic cylinder 10 is threadedly connected to the outer wall of one of the sliders 7. A second turntable 105 is arranged parallel above the first turntable 102, and the second turntable 105 is coaxially arranged with the first turntable 102. The surface of the second turntable 105 is provided with four arc-shaped grooves 106 for sliding rods 8, and a guide groove 107 is provided on the inner wall of the middle part of the second turntable 105. A protrusion 108 is slidably connected to the inner wall of the guide groove 107. It should be noted that in this embodiment, the pipe body 2 is mainly divided into a flange and a pipe. The outer fixing plate 5 is used to fix the outside of the flange, and the inner fixing rod 6 is used to fix the inner wall of the pipe. The whole is fixed synchronously inside and outside, and the pipe and flange are coaxial. Specifically, first, the flange is fixed. The cross-section of the outer fixing plate 5 is V-shaped with relatively smooth edges. Using four outer fixing plates 5 against the outer wall of the flange ensures that the flange will not shift during welding. The hydraulic cylinder 10 is activated, and its piston rod pushes the corresponding slider 7 to slide along the corresponding strip groove 101. Simultaneously, the outer fixing plate 5 corresponding to that slider 7 slides inward, driving the first turntable 102 to rotate counterclockwise, causing the remaining sliders 7 to rotate and shift synchronously, thereby causing the remaining outer fixing plates 5 to slide inward synchronously until the outer wall of the flange is fixed. Furthermore, for example Figure 3 and Figure 4As shown, two first connecting rods 103 are respectively located on the upper surface of the first turntable 102, and are distributed on the left and right respectively. Two second connecting rods 104 are respectively located on the lower surface of the first turntable 102, and are distributed in front and behind respectively. This ensures that the first connecting rods 103 and the second connecting rods 104 will not contact each other, effectively avoiding motion interference. When the first turntable 102 rotates counterclockwise, the four outer fixing plates 5 are opened and closed synchronously through the transmission of the first connecting rods 103 and the second connecting rods 104, thereby fixing the outer wall of the flange. In addition, each closing and fixing process can center the flange of the pipe body 2, so that the central axis of the flange coincides with the central axis of the first turntable 102. Next, the pipe of the pipe body 2 is fixed by four internal fixing rods 6. A guide groove 107 is provided on the inner wall of the middle part of the second turntable 105. The inner wall of the guide groove 107 is slidably connected to the protrusion 108. The second turntable 105 is directly driven to rotate by the up and down sliding of the protrusion 108. Specifically, when the protrusion 108 moves upward, it drives the second turntable 105 to rotate clockwise; when the protrusion 108 moves downward, it drives the second turntable 105 to rotate counterclockwise. The surface of the second turntable 105 is provided with four arc-shaped grooves 106 distributed at equal angles. The tops of the four sliding rods 8 are respectively fixedly connected to the four inner fixing rods 6. The bottoms of the four sliding rods 8 pass through the four strip-shaped sliding grooves 101 and the four arc-shaped grooves 106 respectively. When the second turntable 105 rotates clockwise, it drives the four arc-shaped grooves 106 to rotate and move synchronously, thereby driving the four inner fixing rods 6 to slide outward synchronously until the inner wall of the pipe body 2 is pressed against and fixed. Similarly, when the second turntable 105 rotates counterclockwise, the four inner fixing rods 6 will slide inward synchronously and separate from the inner wall of the pipe. Since the second turntable 105 and the first turntable 102 are coaxially set, the inner fixing rods 6 are used to fix the pipe, and the outer fixing plate 5 is used to fix the flange. This design can ensure the coaxiality of the pipe and the flange, thereby improving the welding quality. Furthermore, the movement of the protrusion 108 is directly controlled by the drive mechanism 4. On the one hand, the drive mechanism 4 drives the ball hammer 3 to track the welding gun along the set path in real time and strikes at the moment the weld is formed, promoting the deep penetration of the molten liquid. On the other hand, through the transmission between the guide groove 107 and the protrusion 108, the drive mechanism 4 synchronously controls the rotation of the second turntable 105, so that the inner fixing rod 6 is in a dynamic limit state during the striking operation, realizing the synchronous coordination of welding, dynamic fixing and weld striking, and ensuring the stability of the pipe fitting and the welding quality throughout the process. In addition, the strip groove 101 is designed to be straight, while providing sliding guidance for the slider 7 and the slide bar 8, ensuring that the outer fixing plate 5 and the inner fixing bar 6 maintain linear sliding.

[0029] In this embodiment, as Figure 6 , Figure 8 and Figure 9As shown, the drive mechanism 4 includes a main shaft 401 that passes through the second turntable 105 and is rotatably connected to the first turntable 102. A rack 402 is slidably connected to the side wall of the main shaft 401. A large gear 403 meshes with one side of the rack 402, and a small gear 404 meshes with one side of the large gear 403. A protrusion 108 is fixedly connected to the bottom of the rack 402. A mounting bracket is fixedly connected to the top of the main shaft 401. The large gear 403 is rotatably connected to the inner wall of the mounting bracket via a shaft. A rotating shaft 405 passes through the inside of the small gear 404. A rocker arm 406 is fixedly connected to one end of the rotating shaft 405. A through groove is provided on the surface of the rocker arm 406, and a lever 407 is slidably connected to the inner wall of the through groove. A cylinder 4011 is installed on the outside of the mounting bracket, and the piston rod of the cylinder 4011 is threadedly connected to the lever 407. A telescopic rod is fixedly connected to the outer surface of the rotating shaft 405. The telescopic rod includes a telescopic rear rod 408 fixedly connected to the rotating shaft 405, and a telescopic front rod 409 sliding along the telescopic rear rod 408. A lead screw 4010 is rotatably connected to the inner wall of the telescopic rear rod 408, and the lead screw 4010 and the telescopic front rod 409 are connected by a threaded connection. It should be noted that the controller controls the piston rod of cylinder 4011 to extend or retract, which drives the lever 407 to move vertically up and down along the through groove, thereby driving the rocker arm 406 to swing. The rotating shaft 405, which is fixedly connected to the other end of the rocker arm 406, rotates accordingly. The rotating shaft 405 passes through the small gear 404 and meshes with the inner wall of the small gear 404, thereby driving the small gear 404 to rotate synchronously. The small gear 404 meshes with the large gear 403, and the large gear 403 drives the rack 402 to slide up and down along the side wall of the main shaft 401. The bottom of the rack 402 is fixedly connected to the protrusion 108. The vertical movement of the rack 402 can drive the protrusion 108 to slide along the guide groove 107, driving the second turntable 105 to perform reciprocating rotational motion, so as to realize the inward retraction or outward expansion of the inner fixed rod 6. In the initial state, the inner fixing rod 6 is first adjusted to the inward retracted state, the piston rod of the control cylinder 4011 is extended, the rocker arm 406 is tilted upward, and during the upward tilting of the rocker arm 406, the rotating shaft 405 and the small gear 404 rotate clockwise, thereby driving the telescopic rod and the ball hammer 3 to swing downward. By rotating the lead screw 4010 on the inner wall of the telescopic rear rod 408, the telescopic front rod 409 can be controlled to slide along the telescopic rear rod 408, thereby adjusting the overall length of the telescopic rod. The length of the telescopic rod is adjusted according to the height of the pipe fitting to ensure that the ball hammer 3 can be aligned with the weld when the telescopic rod is swung to the end position, so as to adapt to the welding requirements of pipe fitting body 2 of different sizes and ensure that the ball hammer 3 can accurately strike the weld position. At the same time, the large gear 403 meshing with the small gear 404 rotates counterclockwise, and the rack 402 meshing with the large gear 403 slides vertically downward. The rack 402 drives the protrusion 108 to slide down along the guide groove 107. The second turntable 105 rotates counterclockwise, driving the four inner fixing rods 6 to retract inward. Next, the pipe body 2 is placed on the hollow carrier plate 1. The pipe of the pipe body 2 is fitted over the four inner fixing rods 6, and the flange is fitted over the outside of the pipe. The four outer fixing plates 5 are controlled by the hydraulic cylinder 10 to retract until they abut against the outer wall of the flange. The cylinder 4011 is activated again to retract the piston rod. At this time, the rocker arm 406 tilts downward and gradually returns to its original position. The rotating shaft 405 and the small gear 404 rotate counterclockwise, and the large gear 403 rotates clockwise. The rack 402 slides upward, causing the protrusion 108 to slide upward along the guide groove 107. The second turntable 105 rotates clockwise, and the four inner fixing rods 6 extend outward until they abut against the inner wall of the pipe. At this time, the telescopic rod also causes the ball hammer 3 to disengage from the weld. The piston rod of the cylinder 4011 drives the rocker arm 406 to swing back and forth, thereby driving the second turntable 105 to rotate back and forth. Specifically, the following functions are achieved: When the ball hammer 3 strikes the weld, the inner fixing rod 6 simultaneously retracts inward and disengages from the inner wall of the pipe, preventing the pipe from locking with the flange. Under the impact of the ball hammer 3, the pipe can still undergo a small displacement, facilitating the penetration of the freshly molten liquid into the deeper layers of the weld. When the ball hammer 3 detaches from the weld, the inner fixing rod 6 simultaneously expands outward, repositioning and locking the pipe. During this process, the position of the pipe is recalibrated, ensuring that the pipe and flange remain coaxial again. This achieves synchronous linkage between dynamic fixing and weld striking throughout the entire process. Compared to traditional fixed positioning methods, dynamic positioning releases the pipe constraint at the moment of striking. The slight displacement of the pipe, combined with the striking force of the ball hammer 3, creates a penetration space for the molten liquid, allowing it to fully fill the weld gap, improving the weld bonding strength, effectively enhancing the welding effect and quality, and further strengthening the weld's firmness.

[0030] In this embodiment, as Figure 5 and Figure 6 As shown, a limiting rod 301 is fixedly connected to the outer wall of the spherical hammer 3, and a spring 302 is sleeved on the outside of the limiting rod 301; A motor 9 is mounted on the lower surface of the hollow carrier plate 1, and the bottom of the main shaft 401 passes through the hollow carrier plate 1 and is connected to the output shaft of the motor 9. It should be noted that one end of the limiting rod 301 passes through the spring 302 and is slidably connected to the end of the telescopic front rod 409. The limiting rod 301 and the telescopic front rod 409 are perpendicular to each other. The limiting rod 301 has a certain length. The rotation radius of the ball hammer 3 can be adjusted by the telescopic rod. The limiting rod 301 is perpendicular to the telescopic front rod 409 and is slidably connected. The extension and retraction length of the limiting rod 301 at the end of the telescopic front rod 409 has a certain adjustment space. The vertical distance of the ball hammer 3 relative to the weld surface can be changed by sliding the limiting rod 301. In addition, when the ball hammer 3 strikes the weld, the spring 302 is compressed to absorb the impact force, reducing equipment wear and pipe damage. After the strike, the spring 302 resets, driving the ball hammer 3 back to its initial position. At the same time, the reset and stretching process forms a uniform and continuous small-amplitude vibration, which prolongs the time when energy is applied to the weld, allowing the molten liquid to have more time to fill the depth of the weld, reducing defects such as incomplete welding and incomplete penetration. In addition, a motor 9 is installed at the bottom of the main shaft 401. The motor 9 drives the main shaft 401 to rotate, which in turn drives the ball hammer 3 to rotate at a constant speed. Its rotation speed is consistent with the moving speed of the welding torch, and the position of the welding torch is tracked in real time. During the welding process, when the welding torch moves along the weld seam of the pipe body 2, the drive mechanism 4 will precisely control the ball hammer 3 to move synchronously and always keep it in a suitable position behind the welding torch. Once the weld seam is formed, the ball hammer 3 will strike in time to promote the molten liquid to penetrate deeper. Compared with manual operation, the overall movement rhythm driven by the motor 9 is more stable. The ball hammer 3 can always strike the newly molten weld seam in time and accurately, and there will be no inconsistent striking effect due to unstable speed.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tooling fixture for welding flange pipe fittings, comprising a hollow carrier plate (1) and a pipe fitting body (2) mounted on the upper surface of the hollow carrier plate (1), characterized in that: It also includes a spherical hammer (3) located on the upper surface of the hollow carrier plate (1) for striking the weld position of the pipe body (2), and a drive mechanism (4) located in the middle of the upper surface of the hollow carrier plate (1) for connecting the spherical hammer (3) and controlling the spherical hammer (3) to move along a set path. The drive mechanism (4) can drive the spherical hammer (3) to track the welding gun in real time so that the molten liquid can penetrate into the deep layer of the weld of the pipe body (2). The outer wall of the pipe body (2) is provided with four external fixing plates (5) distributed at equal angles, and the inner wall of the pipe body (2) is provided with four internal fixing rods (6) distributed at equal angles, and the four internal fixing rods (6) correspond one-to-one with the four external fixing plates (5).

2. The tooling fixture for welding flange pipe fittings according to claim 1, characterized in that: The upper surface of the hollow carrier plate (1) is provided with four strip grooves (101). The bottom of each outer fixing plate (5) is fixedly connected with a slider (7) that slides along the strip groove (101). The bottom of each inner fixing rod (6) is fixedly connected with a sliding rod (8) that slides along the strip groove (101).

3. The welding fixture for flange pipe fittings according to claim 1, characterized in that: The inner wall of the hollow carrier plate (1) is rotatably connected to a first turntable (102). The upper surface of the first turntable (102) is rotatably connected to two first connecting rods (103). The lower surface of the first turntable (102) is rotatably connected to two second connecting rods (104). One end of each of the two first connecting rods (103) is connected to two of the outer fixing plates (5) via a slider (7). One end of each of the two second connecting rods (104) is connected to the other two outer fixing plates (5) via a slider (7). A hydraulic cylinder (10) is installed on the upper surface of the hollow carrier plate (1), and the piston rod of the hydraulic cylinder (10) is threadedly connected to the outer wall of one of the sliders (7).

4. The welding fixture for flange pipe fittings according to claim 3, characterized in that: A second turntable (105) is arranged parallel above the first turntable (102), and the second turntable (105) is coaxially arranged with the first turntable (102). The surface of the second turntable (105) is provided with four arc-shaped grooves (106) for sliding rods (8), and a guide groove (107) is provided on the inner wall of the middle part of the second turntable (105). The inner wall of the guide groove (107) is slidably connected with a protrusion (108).

5. The welding fixture for flange pipe fittings according to claim 4, characterized in that: The drive mechanism (4) includes a main shaft (401) that passes through the second turntable (105) and is rotatably connected to the first turntable (102). A rack (402) is slidably connected to the side wall of the main shaft (401). A large gear (403) meshes with one side of the rack (402), and a small gear (404) meshes with one side of the large gear (403). The protrusion (108) is fixedly connected to the bottom of the rack (402).

6. The welding fixture for flange pipe fittings according to claim 5, characterized in that: A mounting bracket is fixedly connected to the top of the main shaft (401). The large gear (403) is rotatably connected to the inner wall of the mounting bracket via a shaft. A rotating shaft (405) passes through the interior of the small gear (404). A rocker arm (406) is fixedly connected to one end of the rotating shaft (405). A through groove is provided on the surface of the rocker arm (406), and a lever (407) is slidably connected to the inner wall of the through groove. A cylinder (4011) is installed on the outside of the mounting bracket, and the piston rod of the cylinder (4011) is threadedly connected to the lever (407). A telescopic rod is fixedly connected to the outer surface of the rotating shaft (405).

7. A welding fixture for flange pipe fittings according to claim 6, characterized in that: The telescopic rod includes a telescopic rear rod (408) fixedly connected to a rotating shaft (405), and a telescopic front rod (409) sliding along the telescopic rear rod (408). A lead screw (4010) is rotatably connected to the inner wall of the telescopic rear rod (408), and the lead screw (4010) and the telescopic front rod (409) are connected by a thread.

8. The tooling fixture for welding flange pipe fittings according to claim 1, characterized in that: The outer wall of the spherical hammer (3) is fixedly connected to a limiting rod (301), and a spring (302) is sleeved on the outside of the limiting rod (301).

9. A welding fixture for flange pipe fittings according to claim 6, characterized in that: A motor (9) is mounted on the lower surface of the hollow carrier plate (1), and the bottom of the main shaft (401) passes through the hollow carrier plate (1) and is connected to the output shaft of the motor (9).

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